Charles H. and Ruth Moss, by then having full rights, decide to sell the rock. First offer goes to the Texas Parks and Wildlife who are unable to afford the asking price.
March 1, The Nature Conservancy, a private concern based in Arlington, Virginia, at the behest of Lady Bird Johnson, acquires the property for $1.3 million, and agrees to act as interim owner until State of Texas can take over, thus guaranteeing that the area will not be open to private development.
Archaeological evidence indicates human visitation at the rock going back at least 11,000 years.
According to the book The Enchanted Rock published in 1999 by Ira Kennedy 
These hunter-gatherers had flint-tipped spears, fire, and stories. With these resources, some twelve thousand years ago, the first Texans became the wellspring of Plains Indian culture. On the basis of archaeological evidence, human habitation at Enchanted Rock can be traced back at least 10,000 years. Paleo-Indian projectile points, or arrowheads, 11–12,000 years old have been found in the area upstream and downstream from The Rock. The oldest authenticated projectile point found within the present day park is a Plainview point type, dating back 10,000 years.
The rock has been the subject of numerous geological surveys and paintings.
Legends and Mysticism
Folklore of local Tonkawa, Apache and Comanche tribes ascribes magical and spiritual powers to the rock (hence the name 'Enchanted Rock'). While attempting to hide from Anglo settlers in the area, the natives would hide on the top two tiers of the rock, where they were invisible from the ground below. The first European to visit the area was probably Álvar Núñez Cabeza de Vaca in 1536. The Tonkawa, who inhabited the area in the 16th century, believed that ghost fires flickered at the top of the dome. In particular they heard unexplained creaking and groaning, which geologists attribute to the rock's night-time contraction after being heated by the sun during the day. The name "Enchanted Rock" derives from Spanish and Anglo-Texan interpretations of such legends and related folklore; the name "Crying Rock" has also been given to the formation.
The following is on a plaque on Enchanted Rock
From its summit in 1841, Captain John C. Hays, while surrounded by Comanche Indians who cut him off from his ranging company repulsed the whole band and inflicted upon them such heavy losses that they fled.
Other legends  associated with Enchanted Rock are
Named “Spirit Song Rock” for native legends
Revered by native tribes as a holy portal to other worlds
Anyone spending the night on the rock becomes invisible
Spanish priest fled to the rock pursued by native tribes, disappeared, and returned to tell a mystic tale of falling into a cavern and being swallowed by the rock, encountering many spirits in the tunnels, eventually to be spit out two days later
Haunted by spirits of warriors of a now-extinct native American tribe who were slaughtered at Enchanted Rock by a rival tribe
Haunted by a native American princess who threw herself off the rock after witnessing the slaughter of her people
Believed to be a lost silver mine, or the lost El Dorado gold
Bad fortune and death will befall anyone who climbs the rock with bad intent
Footprint indentations on the rock of native American chief who sacrificed his daughter, condemned to walk Enchanted Rock forever
Woman’s screams at night are of a white woman who took refuge on Enchanted Rock after escaping a kidnapping by native Americans
Spanish soldier Don Jesús Navarro’s Enchanted Rock rescue of native maiden Rosa, daughter of Chief Tehuan, after her kidnap by Comanches intent on sacrificing her on the rock
Flora and fauna
Sedum growing on top of Enchanted Rock near a vernal pool.
Vernal pool at the top of Enchanted Rock in 1998.
More than 500 species of plants, from four chief Plant Communities — Open Oak Woodland, Mesquite Grassland, Floodplain, and Granite Rock Community — inhabit the rock. Vernal pools, ecologically threatened depressions of flora and fauna adapted to harsh environments, contain fragile invertebrate fairy shrimp. Other wildlife includes bats, ringtails, squirrels, and fox. A wide variety of lizards, including the Texas Horned Lizard also make the Enchanted Rock area their home.
Emphasis is placed on activity safety and ecological preservation. Visitors are asked to keep human incursion at a minimum by not disturbing plants, animals or artifacts.
Federal and state statutes, regulations and rules governing archeological and historic sites apply. The state Game Warden as a commissioned peace officer is authorized to inspect natural resources and take any necessary action for the preservation of the resources.
Texas Parks and Wildlife Department partners with Friends of Enchanted Rock, a volunteer-based nonprofit organization that works for the improvement and preservation of Enchanted Rock State Natural Area. Scheduled Summit Trail tours are the third Saturday of the month starting April, May, September, October, November, and December. Private tours are available for groups at other times.
Enchanted Rock State Natural Area main trailhead sign, 10 Aug 2013.
Enchanted Rock in 1912, showing exfoliation of the granite parallel to the surface.
Enchanted Rock aerial view in Sept. 2008.
A view of distant rain clouds, from atop Enchanted Rock in July 2008.
Turkey Peak, Enchanted Rock State Natural Area, 10 Aug 2013.
^"Enchanted Rock". Texas Historic Markers. William Nienke, Sam Morrow. Retrieved 25 January 2011.
^ abcUniversity of Texas at Austin, Bureau of Economic Geology, Barnes, V.E.,Hartmann, Barbara and Scranton, D.F., 1992, Geologic map of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:500000. 
^Walker, Nicholas, Middle Proterozoic geologic evolution of Llano uplift, Texas: Evidence from U-Pb zircon geochronometry, Geological Society of America Bulletin 1992;104;494–504
^Paige, S. 1912. Llano-Burnet folio, Texas. United States Department of the Interior, U.S. Geological Survey, Folios of the Geologic Atlas, No. 183, 16 pp. (See Plate 10)
Dobie, J Frank; Estill, Julia (1995). "The Enchanted Rock in Llano County". Legends of Texas: Volume II: Pirates' Gold and Other Tales. Pelican Publishing. pp. 78–82. ISBN978-1-56554-073-6.Cite uses deprecated parameters (help)
Allred, Lance (2009). Enchanted Rock: A Natural and Human History. University of Texas Press. ISBN978-0-292-71963-7.
Moore, Stephen L (2007). "Enchanted Rock and Bird's Fort". Savage Frontier: 1840–1841: Rangers, Riflemen, and Indian Wars in Texas. University of North Texas Press. ISBN978-1-57441-228-4.